Food Safety Report: Hotel Riu Guanacaste, Playa Matapalo, RIU Guanacaste Route, Guanacaste Province, Sardinal, Costa Rica 4 months ago • details 2 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Fever, Stomach Pain, Cramps, Chills, other: Joint pain Suspected source: Water Onset: 1 to 2 days Duration: One Week Sick: Me